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what size second battery for my plan


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got a d3400 already underhood and big 3. stock alt 105a. want to run a 2000w sub amp and 300w mi/high amp. what size battery do i need in back to support this ? i know i may need a bigger alternator but that later on the list

How much room od you have in the back? Are you looking to upgrade to a bigger system any time soon or are you planning on staying around 2000watts for a while? I only ask because it doesn't make sense to spend money on something now, that you will need to upgrade in the future.

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How much room od you have in the back? Are you looking to upgrade to a bigger system any time soon or are you planning on staying around 2000watts for a while? I only ask because it doesn't make sense to spend money on something now, that you will need to upgrade in the future.

have good room in back, its a suv,and i dont plan on going past the 2500 mark

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have good room in back, its a suv,and i dont plan on going past the 2500 mark

What suv is this that you have? The reason I ask is you may be able to fit a D3100 where the battery that you have now is at and that would work well enough as a primary battery on 2500 watts. On top of running a D3100 I would reccomend at least a run of 0 guage to your amp for power and a run of 0 for negative as well.

Then there's always the thought of adding a high output alt and can be done down the road when you can either afford it or decide that you would like to keep nice 14 volts while playing full tilt on music.

Edited by Nightshade

2013 VW Jetta GLI 2.0 Turbo

1 Sundown Audio SCV2000

1 Sundown Audio X15 V2

1 XS Power D3100

Audio Control LC6i

Stock Deck

146.4 sealed on the dash at 37hz

2001 Focus ZX3: RETIRED

Team Sundown Audio, Team XS Power, 2 time NSPL Car 3601-Up Champion, 2 time NSPL Car Hardcore Champion
Highest NSPL Scores to date:
154.3db on the dash sealed at 46hz, 156.2db in the kick at 46hz
155.2db unofficial on dash at 43hz

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What suv is this that you have? The reason I ask is you may be able to fit a D3100 where the battery that you have now is at and that would work well enough as a primary battery on 2500 watts. On top of running a D3100 I would reccomend at least a run of 0 guage to your amp for power and a run of 0 for negative as well.

Then there's always the thought of adding a high output alt and can be done down the road when you can either afford it or decide that you would like to keep nice 14 volts while playing full tilt on music.

s1o chevy blazer, and the 3400 was the largest i could fit underhood, so with that underhood how much additional battery do i need in back with my amps?

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